Polymer Raw Material

At a glance

Which grade does what

A quick comparison before the detail. If you are matching an existing product, send us a sample or the current spec sheet and we will match the grade rather than guess.

Grade comparison
Grade	Character	Typical process	Typical end use
LDPE	Soft, clear, tough, excellent seal strength	Blown & cast film, extrusion coating	Bags, liners, shrink and stretch film
LLDPE	High puncture and tear resistance	Blown film, blending with LDPE	Heavy duty sacks, stretch film
HDPE	Stiff, crinkly, high tensile strength	Blown film, injection & blow moulding	Carriers, bin liners, drums, containers
Polypropylene	Glass clear, heat resistant, stiff	Injection moulding, film, raffia	Crates, closures, clear bags, woven sacks
Moulding grade	High melt flow for fast cavity fill	Injection & blow moulding	Buckets, crates, housings, toys
Bottling grade	Food contact clarity, ESCR resistant	Blow moulding, preform injection	Bottles, jars, jerry cans, closures

LDPE resin: translucent pellets beside a roll of soft flexible film

Film grade

LDPE — low density polyethylene

The everyday film resin. Soft, flexible and clear with excellent heat-seal strength, which is why most of the bags we make start life as LDPE. Blends easily with LLDPE where extra puncture resistance is needed.

Melt flow index: 0.3 – 2.0 g/10 min (film) · up to 20 for coating
Density: 0.918 – 0.925 g/cm³
Forms: Prime virgin, food grade virgin, repro
Colours: Natural, black, or masterbatch matched

Best for: butcher bags, produce bags, bread bags, bin liners, shrink film, laminating film.

HDPE resin: opaque white pellets beside a moulded jerry can

Film & moulding

HDPE — high density polyethylene

Stiffer and stronger than LDPE at the same gauge, which means thinner, lighter bags that still carry the load — the reason vest carriers and bin liners are usually HDPE. In moulding grades it becomes drums, crates and containers.

Melt flow index: 0.04 – 0.35 g/10 min (film) · 4 – 20 (moulding)
Density: 0.941 – 0.965 g/cm³
Forms: Film, injection, blow moulding and pipe grades
Colours: Natural, black, white, full colour range

Best for: carrier bags, refuse bags, freezer bags, jerry cans, crates, industrial containers.

Clarity & stiffness

Polypropylene

Where you need glass clarity, stiffness or heat resistance. Homopolymer for rigid, high-clarity work; copolymer where impact strength matters, particularly in the cold. Also the base for woven raffia sacks and BOPP film.

Melt flow index: 1.5 – 12 (moulding) · 2 – 4 (film)
Density: 0.895 – 0.910 g/cm³
Types: Homopolymer, block & random copolymer, raffia
Colours: Natural clear, black, colour matched

Best for: crystal-clear bags, crates, closures, housewares, woven bags, hot-fill applications.

Injection & blow

Moulding grade

High melt flow polymer that fills a cavity fast and releases clean — the grade to ask for when your cycle time and part finish matter more than film properties. Supplied in PE and PP, in general purpose and impact-modified versions.

Melt flow index: 4 – 40 g/10 min depending on part geometry
Options: General purpose, high impact, UV stabilised, anti-static
Forms: Natural pellet plus masterbatch, or pre-coloured compound
Colours: Any — matched to a Pantone or a physical sample

Best for: buckets, crates, bins, caps, housings, garden furniture, toys.

Food contact

Bottling grade

Resin selected for blow moulding and preform work — consistent clarity, good environmental stress crack resistance and food contact compliance. Available in the grades used for water, dairy, juice, detergent and chemical packaging.

Processes: Extrusion blow, injection stretch blow, preform injection
Key properties: ESCR, clarity, top-load strength, low taint
Compliance: Food contact grades with supporting documentation
Colours: Clear, opaque white, and tinted to spec

Best for: bottles, jars, jerry cans, dairy containers, closures and preforms.

Colour

Natural, black, or matched to your brand

Material ships natural or black off the shelf. Anything else is achieved with masterbatch dosed at the machine, or supplied pre-compounded when colour consistency across a long run is critical. Send a Pantone reference or a physical sample and we will match it.

Natural

White

Black

Green

Blue

Red

Orange

Yellow

Purple

Pink

Beige

Grey

A note on colour: screen colours are indicative only. Repro (recycled) material carries a base tint that limits how light a colour can go — pale shades usually need virgin resin. We will tell you upfront which is achievable in your grade and budget.

How it ships

From one bag to a full load

25 kgStandard bag — minimum order quantity for trials and small runs

1 000 kgPallet lots, shrink wrapped and labelled with batch number

BulkFull container and bulk load pricing on contract supply

Batch numbers recorded so a repeat order matches the last one
Technical data sheets supplied with every grade

Sample quantities for machine trials before you commit
Contract pricing available on regular monthly volumes

Tell us the grade, the colour and the tonnage.

Or send the spec sheet of what you currently run and we will quote the equivalent.

Request a quote 084 467 7746